I think it has more to do with those with higher bone and muscle mass not floating as well than anything attitudinal.
LOL! Perhaps. Perhaps I watch to many shows where the natives in Africa and other geographical locations like it where the natives are always seen either in boats or knee deep by the shore facing the water. In one interview, an old man said the crocodiles were always 'taking' people.
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Be that as it may, the fact the bitter old hags criticizing this lovely and accomplished young lady shows just how petty and racist they can be.
Good for you Gabby! Show 'em how it's done with class!